Hello , RecyclerView

MainActivity

package cc.testrecyclerview1;

import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Toast;
import java.util.ArrayList;

/**
 *
 * 原创作者：
 * 谷哥的小弟
 *
 * 博客地址：
 * http://blog.csdn.net/lfdfhl
 *
 * Demo描述:
 * RecyclerView入门
 *
 * RecyclerView常用的三种LayoutManager
 *
 * 1 GridLayoutManager:实现类似于GridView的效果
 * 2 LinearLayoutManager:实现类似于ListView的效果
 * 3 StaggeredGridLayoutManager：类似于实现瀑布流的效果
 *
 */
public class MainActivity extends AppCompatActivity {
    private Context mContext;
    private RecyclerView mRecyclerView;
    private RecyclerViewAdapter mRecyclerViewAdapter;
    private RecyclerViewItemTouchListener mRecyclerViewItemTouchListener;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
    }

    private void init(){
        mContext=this;
        mRecyclerView= (RecyclerView) findViewById(R.id.recyclerView);
        ArrayList<String> list=new ArrayList<String>();
        for (int i=0;i<20;i++){
            list.add("item "+i);
        }
        LinearLayoutManager linearLayoutManager=new LinearLayoutManager(mContext);
        GridLayoutManager gridLayoutManager=new GridLayoutManager(mContext,3,GridLayoutManager.VERTICAL,false);
        mRecyclerView.setLayoutManager(linearLayoutManager);
        //mRecyclerView.setLayoutManager(gridLayoutManager);
        mRecyclerViewAdapter=new RecyclerViewAdapter(mContext,list);
        mRecyclerView.setAdapter(mRecyclerViewAdapter);

        mRecyclerViewItemTouchListener =new RecyclerViewItemTouchListener(mContext, mRecyclerView, new RecyclerViewItemTouchListener.OnItemClickListener() {
            @Override
            public void onItemClick(View view, int position) {
                Toast.makeText(mContext,"单击 "+position,Toast.LENGTH_SHORT).show();
                mRecyclerViewAdapter.changeData(position);
            }

            @Override
            public void onItemLongClick(View view, int position) {
                Toast.makeText(mContext,"长按 "+position,Toast.LENGTH_SHORT).show();
                mRecyclerViewAdapter.addData(position);
            }
        });

        mRecyclerView.addOnItemTouchListener(mRecyclerViewItemTouchListener);

    }
}

RecyclerViewAdapter

package cc.testrecyclerview1;


import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.List;

public class RecyclerViewAdapter extends RecyclerView.Adapter{
    private Context context;
    private List<String> dataList;

    public RecyclerViewAdapter(Context context,List<String> dataList){
        this.context=context;
        this.dataList=dataList;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView= LayoutInflater.from(context).inflate(R.layout.recyclerview_item,parent,false);
        ViewHolder viewHolder=new ViewHolder(itemView);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        ViewHolder viewHolder= (ViewHolder) holder;
        viewHolder.textView.setText(dataList.get(position));
    }

    @Override
    public int getItemCount() {
        if (null!=dataList){
            return dataList.size();
        }else {
            return 0;
        }
    }

    //移除数据
    public void removeData(int position) {
        dataList.remove(position);
        notifyItemRemoved(position);
    }
    //新增数据
    public void addData(int position){
        dataList.add(position,"add data "+position);
        notifyItemInserted(position);
    }
    //更改数据
    public void changeData(int position){
        dataList.set(position,"change data "+ position);
        notifyItemChanged(position);
    }



    private class ViewHolder extends RecyclerView.ViewHolder{
        private TextView textView;
        public ViewHolder(View itemView) {
            super(itemView);
            textView= (TextView) itemView.findViewById(R.id.textView);
        }
    }



}

RecyclerViewItemTouchListener

package cc.testrecyclerview1;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;

import static cc.testrecyclerview1.R.id.recyclerView;

public class RecyclerViewItemTouchListener implements RecyclerView.OnItemTouchListener{
    private Context context;
    private RecyclerView recyclerView;
    private GestureDetector gestureDetector;
    private GestureListenerImpl gestureListenerImpl;
    private OnItemClickListener clickListener;

    public interface OnItemClickListener{
        void onItemClick(View view, int position);
        void onItemLongClick(View view, int position);
    }


    public RecyclerViewItemTouchListener(Context context, RecyclerView recyclerView, OnItemClickListener clickListener){
        this.context=context;
        this.clickListener=clickListener;
        this.recyclerView=recyclerView;
        gestureListenerImpl=new GestureListenerImpl();
        gestureDetector=new GestureDetector(context, gestureListenerImpl);
    }

    @Override
    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
        return gestureDetector.onTouchEvent(e);
    }

    @Override
    public void onTouchEvent(RecyclerView rv, MotionEvent e) {

    }

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

    }

    private class GestureListenerImpl implements GestureDetector.OnGestureListener{

        @Override
        public boolean onDown(MotionEvent e) {
            return false;
        }

        @Override
        public void onShowPress(MotionEvent e) {

        }

        @Override
        public boolean onSingleTapUp(MotionEvent e) {
            View itemView = recyclerView.findChildViewUnder(e.getX(), e.getY());
            int position = recyclerView.getChildLayoutPosition(itemView);
            if (null != itemView && null != clickListener) {
                clickListener.onItemClick(itemView, position);
                return true;
            }
            return false;
        }

        @Override
        public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
            return false;
        }

        @Override
        public void onLongPress(MotionEvent e) {
            View itemView = recyclerView.findChildViewUnder(e.getX(), e.getY());
            int position = recyclerView.getChildLayoutPosition(itemView);
            if (null != itemView && null != clickListener) {
                clickListener.onItemLongClick(itemView, position);
            }
        }

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            return false;
        }
    }
}